sata_sil24: replace sil24_update_tf() with sil24_read_tf()

Replace sil24_update_tf() to sil24_read_tf() which reads TF into
passed int result TF argument and can read TFs of PMP links.  This
will be used by PMP support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/sata_sil24.c

@@ -464,15 +464,15 @@ static void sil24_dev_config(struct ata_device *dev)
 		writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
 }
 
-static inline void sil24_update_tf(struct ata_port *ap)
+static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
 {
-	struct sil24_port_priv *pp = ap->private_data;
 	void __iomem *port = ap->ioaddr.cmd_addr;
-	struct sil24_prb __iomem *prb = port;
+	struct sil24_prb __iomem *prb;
 	u8 fis[6 * 4];
 
-	memcpy_fromio(fis, prb->fis, 6 * 4);
-	ata_tf_from_fis(fis, &pp->tf);
+	prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
+	memcpy_fromio(fis, prb->fis, sizeof(fis));
+	ata_tf_from_fis(fis, tf);
 }
 
 static u8 sil24_check_status(struct ata_port *ap)
@@ -538,6 +538,7 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 	struct sil24_port_priv *pp = ap->private_data;
 	struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
 	dma_addr_t paddr = pp->cmd_block_dma;
+	struct ata_taskfile tf;
 	u32 mask, irq_stat;
 	const char *reason;
 
@@ -577,8 +578,8 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 		goto err;
 	}
 
-	sil24_update_tf(ap);
-	*class = ata_dev_classify(&pp->tf);
+	sil24_read_tf(ap, 0, &tf);
+	*class = ata_dev_classify(&tf);
 
 	if (*class == ATA_DEV_UNKNOWN)
 		*class = ATA_DEV_NONE;
@@ -754,6 +755,7 @@ static void sil24_thaw(struct ata_port *ap)
 static void sil24_error_intr(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
+	struct sil24_port_priv *pp = ap->private_data;
 	struct ata_eh_info *ehi = &ap->eh_info;
 	int freeze = 0;
 	u32 irq_stat;
@@ -808,7 +810,7 @@ static void sil24_error_intr(struct ata_port *ap)
 		/* record error info */
 		qc = ata_qc_from_tag(ap, ap->active_tag);
 		if (qc) {
-			sil24_update_tf(ap);
+			sil24_read_tf(ap, qc->tag, &pp->tf);
 			qc->err_mask |= err_mask;
 		} else
 			ehi->err_mask |= err_mask;
@@ -825,8 +827,11 @@ static void sil24_error_intr(struct ata_port *ap)
 
 static void sil24_finish_qc(struct ata_queued_cmd *qc)
 {
+	struct ata_port *ap = qc->ap;
+	struct sil24_port_priv *pp = ap->private_data;
+
 	if (qc->flags & ATA_QCFLAG_RESULT_TF)
-		sil24_update_tf(qc->ap);
+		sil24_read_tf(ap, qc->tag, &pp->tf);
 }
 
 static inline void sil24_host_intr(struct ata_port *ap)